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Control-Oriented Drift-Flux Modeling of Single and Two-Phase Flow for Drilling

Abstract : We present a simplified drift-flux model for gas-liquid flow in pipes. The model is able to handle single and two-phase flow thanks to a particular choice of empirical slip law. A presented implicit numerical scheme can be used to rapidly solve the equations with good accuracy. Besides, it remains simple enough to be amenable to mathematical and control-oriented analysis. In particular, we present an analysis of the steady-states of the model that yields important considerations for drilling practitioners. This includes the identification of 4 distinct operating regimes of the system, and a discussion on the occurrence of slugging in underbalanced drilling.
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Submitted on : Monday, March 25, 2019 - 7:17:52 PM
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Ulf Jakob F Aarsnes, Florent Di Meglio, Steinar Evje, Ole Morten Aamo. Control-Oriented Drift-Flux Modeling of Single and Two-Phase Flow for Drilling. ASME 2014 Dynamic Systems and Control Conference, Oct 2014, San Antonio, United States. pp.1-11, ⟨10.1115/DSCC2014-6121⟩. ⟨hal-01499936⟩



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